Boris Becker defeated Jan Siemerink 5-7 6-3 6-1 in the Monte Carlo Masters round of 64 on clay. The upset overturned the form book — Jan Siemerink came in leading the head-to-head 1–0, defending last year's round of 32. Boris Becker claimed a first win over Jan Siemerink in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-11-03 | Stockholm | R16 | hard | Jan Siemerink | 7-6(6) 6-7(3) 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (40 vs 153). ATP, WTA & Challenger.